Drag-brake lever

Julie Rand's picture

Drag-brake lever

I have a bike with a drag brake at the rear and a V-brake at the front. The rear brake lever needs to pull a longer section of cable to achieve a braking action. Can you recommend a brake lever for the rear drag brake? A V-brake lever is not very effective.

J Silvertown

​Levers for full-length MTB-style linearpull brakes need to pull more cable to actuate the brake than do levers suitable for cantilever and road bike calliper brakes. If used with a brake not designed to work with such levers, a V-brake lever brings the brake blocks up to the rim quickly. The brake will feel ‘hard’ and under-powered, however, since a lever that pulls a lot of cable has a low mechanical advantage. When used with a V-brake calliper, it translates into effective braking due to the high mechanical advantage of long V-brake arms. You don’t specify what your rear drag brake is, but it sounds like you need a lever that pulls less cable, not more. In that case, a Shimano BL-R550 brake lever, which is designed to work with calliper and cantilever brakes, will do the job if you use flat handlebars. You’ll need to stick with the V-brake lever for the front brake. 

Richard Hallett, Cycle's Technical Editor
 

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This Q&A was published in 'Cycle' the magazine for members of Cycling UK. To contact the experts, email your technical, health, legal or policy questions to editor@cyclinguk.org or write to Cycle Q&A, PO Box 313, Scarborough, YO12 6WZ

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